Aromatic diamines and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and polyimide polymers

Abstract

New polynuclear aromatic diamines, such as 2,2'-di-(p-aminophenoxy)-biphenyl, a process for their manufacture and their use as polycondensation components for the manufacture of polyamide, polyamide-imide and polyimide polymers are described. The polymers obtained with the aromatic diamines according to the invention are readily soluble and can also be processed from the melt and are distinguished by good thermal, electrical and/or mechanical properties.

What is claimed is: 
     
       1. A diamine of the formula ##STR18## in which the two amino groups independently of one another are in the o-, m- or p-position of the benzene ring. 
     
     
       2. A diamine of the formula (I) according to claim 1, in which the two amino groups are each in the ortho-position or para-position of the benzene ring. 
     
     
       3. A diamine according to claim 1 which is 2,2'-di-(p-aminophenoxy)biphenyl. 
     
     
       4. A diamine according to claim 1 which is 2,2'-di-(o-aminophenoxy)-biphenyl. 
     
     
       5. A diamine according to claim 1 which is 2-(p-aminophenoxy)-2'-(o-aminophenoxy)-biphenyl.